The Zika virus strain responsible for the outbreaks in Brazil has been detected in Africa for the first time, the World Health Organization says.
The WHO said it was concerned that the latest strain was spreading and was “on the doorstep of Africa”.
It is currently circulating in Cape Verde, an archipelago off the north west coast of Africa.
Zika has been linked to neurological disorders including babies being born with small brains.
Dr Matshidiso Moeti, WHO Regional Director for Africa, said: “This information will help African countries to re-evaluate their level of risk and adapt and increase their levels of preparedness.”